Altera Stratix V Avalon-MM Interface for PCIe Solutions Manual de usuario Pagina 36
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32-Bit Non-Bursting Avalon-MM Control Register Access (CRA) Slave
Signals
The optional CRA port for the full-featured IP core allows upstream PCI Express devices and external
Avalon-MM masters to access internal control and status registers.
Table 4-1: Avalon-MM CRA Slave Interface Signals
Signal Name Directio
n
Description
CraIrq_o
Output Interrupt request. A port request for an Avalon-MM interrupt.
CraReadData_o[31:0]
Output Read data lines
CraWaitRequest_o
Output Wait request to hold off more requests
CraAddress_i[13:0]
Input An address space of 16,384 bytes is allocated for the control
registers. Avalon-MM slave addresses provide address
resolution down to the width of the slave data bus. Because all
addresses are byte addresses, this address logically goes down
to bit 2. Bits 1 and 0 are 0.
CraByteEnable_i[3:0]
Input Byte enable
CraChipSelect_i
Input Chip select signal to this slave
CraRead_i
Input Read enable
CraWrite_i
Input Write request
CraWriteData_i[31:0]
Input Write data
RX Avalon-MM Master Signals
This Avalon-MM master port propagates PCI Express requests to the Qsys interconnect fabric. For the
full-feature IP core it propagates requests as bursting reads or writes. A separate Avalon-MM master port
corresponds to each BAR.
UG-01097_avmm
2014.12.15
32-Bit Non-Bursting Avalon-MM Control Register Access (CRA) Slave Signals
4-3
64- or 128-Bit Avalon-MM Interface to the Application Layer
Altera Corporation
Send Feedback
- User Guide 1
- Datasheet 2
- Features 3
- Interface 4
- Release Information 7
- Device Family Support 7
- Altera FPGA 8
- Debug Features 10
- IP Core Verification 10
- Recommended Speed Grades 11
- Running Qsys 14
- Generating the Example Design 15
- Simulating Altera Designs 17
- Time TLP Type Payload 18
- TLP Header 18
- Creating a Quartus II Project 19
- Compiling the Design 19
- Programming a Device 20
- Parameter Settings 21
- Parameter Value Description 22
- Device Capabilities 25
- Error Reporting 26
- Link Capabilities 27
- MSI and MSI-X Capabilities 28
- Power Management 29
- Clock Domains on page 6-5 33
- Application Layer 34
- RX Avalon-MM Master Signals 36
- Clock Signals 41
- Signal Direction Description 42
- Variant Logical Interfaces 49
- Hard IP Status Extension 50
- Field and Bit Map 58
- 0134678951 58
- Bit(s) Field Description 59
- Serial Data Signals 60
- PIPE Interface Signals 64
- Test Signals 69
- Registers 70
- Altera-Defined VSEC Registers 78
- CvP Registers 79
- Address Range Register 83
- Bit Name Access Description 84
- Bits Name Access Description 85
- PCI Express Mailbox Registers 86
- Avalon-MM Mailbox Registers 90
- Address Name Access 91
- Description 91
- Byte Offset 91
- Register Dir Description 91
- Sending a Write TLP 97
- Root Port TLP Data Registers 99
- UG-01097_avmm 100
- 2014.12.15 100
- Related Information 101
- Bits Register Description 102
- Reset and Clocks 105
- Hard IP for PCI Express 106
- Example Design 106
- Clock Domains 109
- Data Rate Frequency 110
- Clock Summary 112
- Interrupts for Endpoints 113
- MSI/MSI‑X Support 115
- MsiIntfc_o[81:0] 116
- MsiControl_o[15:0] 116
- MsixIntfc_o[15:0] 116
- IntxReq_i 116
- IntxAck_o 116
- Error Handling 117
- Physical Layer Errors 118
- Data Link Layer Errors 118
- Transaction Layer Errors 119
- Error Type Description 120
- Status Bit Conditions 123
- IP Core Architecture 125
- Hard IP for PCI Express 126
- Top-Level Interfaces 127
- Avalon-MM Interface 127
- Clocks and Reset 127
- Transceiver Reconfiguration 127
- Interrupts 127
- Data Link Layer 128
- Altera Corporation 129
- Send Feedback 129
- Physical Layer 130
- TX Packets 131
- Avalon‑MM Bridge TLPs 135
- Byte Enable Value Description 136
- PCI Express Avalon-MM Bridge 138
- RX Block 144
- Avalon-MM RX Master Block 144
- TX Block 145
- Interrupt Handler Block 145
- Enable PLL calibration 147
- Throughput Optimization 151
- Throughput of Posted Writes 153
- Design Implementation 155
- CONF_DONE 156
- Endpoint Reset 156
- Root Port Reset 156
- SDC Timing Constraints 157
- Optional Features 159
- ECRC on the RX Path 160
- ECRC on the TX Path 161
- Debugging 163
- Setting Up Simulation 166
- Use Third-Party PCIe Analyzer 168
- BIOS Enumeration Issues 168
- Address[31:2] 169
- Figure A-6: I/O Read Request 171
- 7 6 5 4 3 2 1 0 175
- Core Config 8 4 1 175
- Additional Information 177
- Date Version Changes Made 178
- How to Contact Altera 182
- Typographic Conventions 182
- Visual Cue Meaning 183
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